#283DAF#283DAF

#283DAF is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.182 H 268.8°. Best body text is #FFFFFF at 8.84:1 contrast (WCAG AA passes).

Color values

HEX	#283DAF
RGB	rgb(40, 61, 175)
HSL	hsl(231, 63%, 42%)
HSV	hsv(231, 77%, 69%)
CMYK	cmyk(77.1%, 65.1%, 0%, 31.4%)
CIE-LAB	lab(31.54, 33.31, -62.85)
CIE-LCH	lch(31.54, 71.14, 297.92°)
OKLab	oklab(42.3% -0.0038 -0.1818)
OKLCH	oklch(42.3% 0.182 268.8)
XYZ	xyz(10.2790, 6.8826, 41.3359)
Luminance	0.0688 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DAF #AF9A28

analogous

#2880AF #283DAF #5728AF

triadic

#283DAF #AF283D #3DAF28

tetradic

#283DAF #AF2880 #AF9A28 #28AF57

square

#283DAF #AF2880 #AF9A28 #28AF57

split-complementary

#283DAF #AF5728 #80AF28

monochromatic

#111A4B #1D2C7D #283DAF #4158D4 #7383DF

Accessibility & contrast

On white

8.84

#283DAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#283DAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DAF

8.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DAF	#FFFFFF	#000000	##FFFFFF
##283DAF	1.00	8.84	2.38	8.84
#FFFFFF	8.84	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B3

Deuteranopia (green-blind)

#0044AD

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #283daf;
/* rgb */ color: rgb(40, 61, 175);
/* oklch */ color: oklch(42.3% 0.182 268.8);

Tailwind

colors: {
  custom: {
    50: '#7872c8',
    500: '#283daf',
    950: '#000000',
  },
}

SCSS

$custom: #283daf;
$custom-light: #7872c8;
$custom-dark: #000000;

JSON

{
  "hex": "#283daf",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 175
  },
  "hsl": {
    "h": 230.667,
    "s": 62.791,
    "l": 42.157
  },
  "oklch": {
    "l": 0.42296,
    "c": 0.18188,
    "h": 268.8
  },
  "luminance": 0.06884
}

Semantic roles & 50–950 ramp

primary

#283DAF

secondary

#C6B86D

accent

#CC42E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283DAF

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →